// 蓝桥杯 20 年 Java B 组省赛 B 题
// 寻找 2020
// https://www.lanqiao.cn/problems/1065/learning/

#include <bits/stdc++.h>
using namespace std;

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};

int main() {
  auto match = [](char a, char b, char c, char d) {
    return a == '2' && b == '0' && c == '2' && d == '0';
  };
  int cnt = 0;
  for (int i = 0; i < maze.size(); ++i) {
    for (int j = 0; j + 3 < maze[i].size(); ++j) {
      cnt += match(maze[i][j], maze[i][j + 1], maze[i][j + 2], maze[i][j + 3]);
    }
  }
  for (int i = 0; i + 3 < maze.size(); ++i) {
    for (int j = 0; j < maze[i].size(); ++j) {
      cnt += match(maze[i][j], maze[i + 1][j], maze[i + 2][j], maze[i + 3][j]);
    }
  }
  for (int i = 0; i + 3 < maze.size(); ++i) {
    for (int j = 0; j + 3 < maze[i].size(); ++j) {
      cnt += match(maze[i][j], maze[i + 1][j + 1], maze[i + 2][j + 2], maze[i + 3][j + 3]);
    }
  }
  cout << cnt << endl;
}